Question

Si (x+y+1) (x+y-1) = 1 Calcular : (x+y) elevado a la 2

Answer 1

Respuesta:

2

Explicación paso a paso:

(a+b)(a+b)=a²-b²

(x+y+1) (x+y-1) = 1

(x+y)²- 1² = 1

(x+y)² -1 = 1

(x+y)² = 2